EXHIBIT 99.4

                                                       DATED:  FEBRUARY 12, 2003

          NEITHER THIS DEBENTURE NOR THE SECURITIES INTO WHICH THIS DEBENTURE IS
          CONVERTIBLE  HAVE BEEN  REGISTERED  WITH THE  SECURITIES  AND EXCHANGE
          COMMISSION OR THE SECURITIES  COMMISSION OF ANY STATE IN RELIANCE UPON
          AN EXEMPTION  FROM  REGISTRATION  UNDER THE SECURITIES ACT OF 1933, AS
          AMENDED (THE "SECURITIES ACT"), AND,  ACCORDINGLY,  MAY NOT BE OFFERED
          OR SOLD EXCEPT PURSUANT TO AN EFFECTIVE  REGISTRATION  STATEMENT UNDER
          THE SECURITIES ACT OR PURSUANT TO AN AVAILABLE EXEMPTION FROM, OR IN A
          TRANSACTION  NOT  SUBJECT  TO, THE  REGISTRATION  REQUIREMENTS  OF THE
          SECURITIES  ACT AND IN ACCORDANCE  WITH  APPLICABLE  STATE  SECURITIES
          LAWS, AS EVIDENCED BY A LEGAL OPINION OF COUNSEL TO THE  TRANSFEROR TO
          SUCH EFFECT, THE SUBSTANCE OF WHICH SHALL BE REASONABLY  ACCEPTABLE TO
          THE COMPANY.

No. 001                                                               $1,560,000

              PRESIDION SOLUTIONS, INC. and MEDIABUS NETWORKS, INC.
                       6.5% SECURED CONVERTIBLE DEBENTURE
                              DUE FEBRUARY 12, 2004

THIS DEBENTURE is issued jointly and severally by Presidion  Solutions,  Inc., a
Florida  Corporation (the  "Company"),  and MediaBus  Networks,  Inc., a Florida
Corporation (the "Parent" and, with the Company, the "Obligors"). The Company is
a  wholly-owned  subsidiary of the Parent.  This  Debenture is designated as the
Obligors'  6.5% Secured  Convertible  Debenture,  due February 12, 2004,  in the
aggregate  principal  amount of One Million Five Hundred Sixty Thousand  Dollars
($1,560,000) (the "Debenture").

FOR VALUE RECEIVED, the Company and the Parent,  jointly and severally,  promise
to pay to MERCATOR FOCUS FUND, L.P., a California  limited  partnership,  or its
registered  assigns (the "Holder"),  the principal sum of $1,560,000 on February
12, 2004 or such  earlier  date as the  Debenture is required or permitted to be
repaid as provided  hereunder (the  "Maturity  Date") and to pay interest to the
Holder on the aggregate  unconverted and then  outstanding  principal  amount of
this Debenture at the rate of 6.5% per annum, with interest accruing  commencing
on the date hereof and payable on the first business day of each month while the
Debenture  remains  outstanding  (each an "Interest  Payment  Date").  The above
notwithstanding,  the  Debenture  shall  become  due  and  immediately  payable,
including  all accrued but unpaid  interest  upon the closing of a Funding Event
(as defined in Section 5).

Subject  to the terms and  conditions  herein,  the  Holder may elect to receive
interest  hereunder in shares of the common stock of the Parent,  $0.0000303 par
value per share (the "Common Stock") or cash. If interest is paid by the Company
in shares  of its  Common  Stock,  then the  number  of  shares of Common  Stock
issuable  on  account  of such  interest  shall  equal  the cash  amount of such

                                      -1-


interest on such  Interest  Payment  Date  divided by the  Conversion  Price (as
defined  below) on such date.  Interest  shall be  calculated  on the basis of a
360-day year and shall accrue daily  commencing  on the Original  Issue Date (as
defined in Section 5) until payment in full of the principal sum,  together with
all  accrued  and  unpaid  interest  and other  amounts,  which may  become  due
hereunder,  has been  made.  Interest  hereunder  will be paid to the Person (as
defined in Section 5) in whose name this  Debenture is registered on the records
of  the  Company  regarding   registration  and  transfers  of  Debentures  (the
"Debenture  Register").  All overdue  accrued and unpaid  interest to be paid in
cash hereunder shall entail a late fee at the rate of 10% per annum ("Late Fee")
(or such  lower  maximum  amount  of  interest  permitted  to be  charged  under
applicable  law) which will  accrue  daily,  from the date such  interest is due
hereunder through and including the date of payment,  payable in cash or, at the
option of the Holder, in shares of Common Stock. If such Late Fee is paid by the
Company in shares of its Common Stock, then the number of shares of Common Stock
issuable  on account of such Late Fee shall  equal the cash  amount of such Late
Fee on such Late Fee payment date divided by the Conversion Price on such date.

     This Debenture is subject to the following additional provisions:

     SECTION 1.   This  Debenture  is   exchangeable   for  an  equal  aggregate
principal  amount  of  Debentures  of  different  authorized  denominations,  as
requested by the Holder  surrendering  the same. No service  charge will be made
for such  registration  of transfer  or  exchange.  The  Company  shall have the
ability to redeem this  Debenture  pursuant to the terms of that certain  Letter
Agreement dated as of the date hereof.

     SECTION 2.   This Debenture has been issued  subject to certain  investment
representations  of the original Holder set forth in the Purchase  Agreement (as
defined in Section 5) and may be  transferred  or exchanged  only in  compliance
with  the  Purchase  Agreement.  Prior to due  presentment  to the  Company  for
transfer of this  Debenture,  the Obligors  and any agent of either  Obligor may
treat the Person (as defined in Section 5) in whose name this  Debenture is duly
registered  on the  Debenture  Register  as the owner  hereof for the purpose of
receiving payment as herein provided and for all other purposes,  whether or not
this  Debenture  is overdue,  and neither the  Company,  the Parent nor any such
agent shall be affected by notice to the contrary.

     SECTION 3.   EVENTS OF DEFAULT.

     (a)  An "Event of  Default",  wherever  used  herein,  means any one of the
following  events  (whatever  the reason and  whether it shall be  voluntary  or
involuntary or effected by operation of law or pursuant to any judgment,  decree
or order of any court, or any order, rule or regulation of any administrative or
governmental body):

          (i)     any  default in the  payment  of the  principal  of,  interest
(including any Late Fees) on or liquidated  damages in respect of the Debenture,
free of any claim of  subordination,  as and when the same shall  become due and
payable (whether on a Conversion Date or the Maturity Date or by acceleration or
otherwise) which is not cured within thirty (30) days after the date the payment
became due and payable;

                                      -2-


          (ii)    the  Parent   shall  fail  to  file  the   Underlying   Shares
Registration  Statement  with  the  Commission  within  sixty  (60)  days of the
Original Issue Date;

          (iii)   the Company or the Parent shall fail to observe or perform any
other  covenant,  agreement or warranty  contained  in, or otherwise  commit any
breach of any of the  Transaction  Documents (as defined in Section 5), and such
failure or breach  shall not have been  remedied  within ten (10) days after the
date on which notice of such failure or breach shall have been given;

          (iv)    the Company or the Parent  shall  commence,  or there shall be
commenced  against  the  Company  or the  Parent's  case  under  any  applicable
bankruptcy  or  insolvency  laws as now or hereafter in effect or any  successor
thereto,  or the Company or the Parent  commences any other proceeding under any
reorganization, arrangement, adjustment of debt, relief of debtors, dissolution,
insolvency  or  liquidation  or similar law of any  jurisdiction  whether now or
hereafter in effect  relating to the Company or the Parent or there is commenced
against  the  Company  or the Parent any such  bankruptcy,  insolvency  or other
proceeding which remains  undismissed for a period of 61 days; or the Company or
the Parent is adjudicated insolvent or bankrupt; or any order of relief or other
order  approving any such case or  proceeding is entered;  or the Company or the
Parent  suffers  any  appointment  of any  custodian  or the  like for it or any
substantial part of its property which continues  undischarged or unstayed for a
period of 61 days; or the Company or the Parent makes a general  assignment  for
the benefit of  creditors;  or the  Company or the Parent  shall fail to pay, or
shall  state  that it is  unable to pay,  or shall be  unable to pay,  its debts
generally  as they become due; or the Company or the Parent shall call a meeting
of  its  creditors  with  a view  to  arranging  a  composition,  adjustment  or
restructuring  of its debts;  or the  Company or the Parent  shall by any act or
failure to act expressly indicate its consent to, approval of or acquiescence in
any of the  foregoing;  or any corporate or other action is taken by the Company
or the Parent for the purpose of effecting any of the foregoing;

          (v)     the  Company  or  the  Parent  shall  default  in  any  of its
obligations under any other debenture or any mortgage, credit agreement or other
facility,  (which  default is not waived or otherwise  acquiesced  to in writing
within thirty (30) days of written notice of such default), indenture agreement,
factoring  agreement or other instrument under which there may be issued,  or by
which there may be secured or evidenced any  indebtedness  for borrowed money or
money due under any long term leasing or factoring arrangement of the Company or
the Parent in an amount exceeding $100,000, whether such indebtedness now exists
or shall hereafter be created and such default shall result in such indebtedness
becoming or being  declared due and payable  prior to the date on which it would
otherwise become due and payable;

          (vi)    the  Common  Stock  shall  cease to be quoted  for  trading or
listed  for  trading on the  National  Association  of  Securities  Dealers  OTC
Bulletin  Board  ("OTC"),  Nasdaq  SmallCap  Market,  New York  Stock  Exchange,
American  Stock  Exchange or the Nasdaq  National  Market  (each,  a "Subsequent
Market") and shall not again be quoted or listed for trading thereon within five
(5) Trading Days;

          (vii)   the  Company or the  Parent  shall be a party to any Change of
Control Transaction (as defined in Section 5);

                                      -3-


          (viii)  an  Underlying  Shares  Registration  Statement (as defined in
Section 5) shall not have been declared  effective by the Commission (as defined
in  Section 5) on or prior to the one  hundred  fiftieth  (150th)  day after the
Original  Issue  Date.  The  Company  and the  Parent  shall each use their best
efforts and all available  resources to have the Underlying Shares  Registration
Statement  declared  effective by the  Commission on or prior to the one hundred
twentieth (120th) day after the Original Issue Date;

          (ix)    if,  during  the  Effectiveness  Period  (as  defined  in  the
Registration  Rights Agreement (as defined in Section 5)), the  effectiveness of
the Underlying Shares Registration Statement lapses for any reason or the Holder
shall not be  permitted  to resell  Registrable  Securities  (as  defined in the
Registration   Rights  Agreement)  under  the  Underlying  Shares   Registration
Statement, in either case, for more than five (5) consecutive Trading Days or an
aggregate of eight Trading Days (which need not be consecutive Trading Days);

          (x)     an Event (as  defined in the  Registration  Rights  Agreement)
shall  not  have  been  cured to the  satisfaction  of the  Holder  prior to the
expiration  of  thirty  (30)  days  from  the  Event  Date  (as  defined  in the
Registration  Rights Agreement)  relating thereto (other than an Event resulting
from a failure of the Underlying  Shares  Registration  Statement to be declared
effective by the Commission on or, prior to the one hundred fiftieth (150th) day
after the Original Issue Date, which shall be covered by Section 3(a)(viii);

          (xi)    the Company shall fail for any reason to deliver  Common Stock
certificates  to a Holder prior to the third Trading Day after a Conversion Date
pursuant to and in  accordance  with  Section  4(b) or the Company or the Parent
shall provide notice to the Holder, including by way of public announcement,  at
any time, of its intention  not to comply with requests for  conversions  of the
Debenture in accordance with the terms hereof;

          (xii)   the  Company  shall fail for any reason to deliver the payment
in cash  pursuant to a Buy-In (as defined  herein)  within  three (3) days after
notice is claimed delivered hereunder;

          (xiii)  the  Company  shall fail for any reason to cause the number of
authorized but unissued  shares of its Common Stock to be increased to an amount
sufficient  to enable the  Company to comply  with the  reserve  requirement  of
Section  4(c)(vi) for a period of sixty (60) days  following  its receipt of any
Holder's notice under Section  4(c)(vi) that such reserve is not being satisfied
if, at the time of the notice,  the number of authorized shares of the Company's
Common Stock is insufficient for this purpose;

          (xiv)   the Parent shall fail to file when due any annual or quarterly
report  required to be filed with the  Commission  or any other report or filing
required to be filed with any regulatory agency; or

          (xv)    the Parent shall fail to have  completed by April 15, 2003 its
financial  statements  (prepared on a consolidated basis with Presidion) for the
year ended December 31, 2002, and to have received an unqualified report thereon
from Ernst & Young, LLP.

     (b)  During the time that any portion of this Debenture is outstanding,  if
any Event of Default occurs and is continuing, the full principal amount of this
Debenture, together with interest and other amounts owing in respect thereof, to

                                      -4-


the date of acceleration shall become at the Holder's election,  immediately due
and payable in cash,  provided  however,  that if the Company informs the Holder
that it will be unable to pay the  amounts  due in cash,  the Holder may request
payment of such  amounts in Common  Stock of the Parent.  If an Event of Default
occurs  and  remains  uncured,  the  percentage  used in Section  4(c)(i)(y)  to
calculate  the price at which the  Debenture  may be  converted  into  shares of
Common Stock shall be reduced from  eighty-five  percent  (85%) to  seventy-five
percent  (75%)  thirty (30) days after the  occurrence  of the Event of Default.
Such percentage  shall remain at  seventy-five  percent (75%) until the Event of
Default is cured.  The Holder  need not  provide  and the Company and the Parent
hereby waive any presentment,  demand,  protest or other notice of any kind, and
the Holder may  immediately  and without  expiration of any grace period enforce
any and  all of its  rights  and  remedies  hereunder  and  all  other  remedies
available to it under  applicable  law.  Such  declaration  may be rescinded and
annulled by Holder at any time prior to payment hereunder. No such rescission or
annulment  shall  affect  any  subsequent  Event of  Default or impair any right
consequent thereon.

     SECTION 4.   CONVERSION.

     (a)    (i)   CONVERSION AT OPTION OF HOLDER.

            (A)   The principal  balance  outstanding under this Debenture shall
be convertible into shares of Common Stock at the option of the Holder, in whole
or in part at any time and from time to time,  after  the  Original  Issue  Date
(subject to the limitations on conversion set forth in Section 4(a)(ii) hereof).
The  number of  shares of Common  Stock  issuable  upon a  conversion  under the
preceding  sentence equals the quotient obtained by dividing (x) the outstanding
principal  amount of this Debenture to be converted by (y) the Conversion  Price
(as defined in Section  4(c)(i)).  Additionally  (subject to the  limitations on
conversion set forth in Section 4(a)(ii)  hereof),  at the option of the Holder,
all  accrued and unpaid  interest on the  Debenture  shall be  convertible  into
Common  Stock.  The number of shares of Common Stock  issuable upon a conversion
under the preceding  sentence  equals the quotient  obtained by dividing (x) all
accrued  and  unpaid  interest  on the  Debenture  to be  converted  by (y)  the
Conversion Price (as defined in Section 4(c)(i)).

          (B)     Notwithstanding  anything to the contrary contained herein, if
on any  Conversion  Date:  (1) the number of shares of Common  Stock at the time
authorized, unissued and unreserved for all purposes, or held as treasury stock,
is  insufficient  to pay  principal  and interest  hereunder in shares of Common
Stock; (2) the Common Stock is not listed or quoted for trading on the OTC or on
a Subsequent  Market; (3) the Company or the Parent has failed to timely satisfy
its conversion;  or (4) the issuance of such shares of Common Stock would result
in a violation  of Section  4(a)(ii),  then,  at the option of the  Holder,  the
Company or the Parent,  in lieu of delivering shares of Common Stock pursuant to
Section 4(a)(i), shall deliver, within three (3) Trading Days of each applicable
Conversion  Date,  an amount in cash  equal to the  product  of the  outstanding
principal amount of the Debentures to be converted plus any interest due therein
divided by the Conversion  Price and multiplied by the highest  closing price of
the  stock  from  date of the  conversion  notice  till the date  that such cash
payment is made.

          (C)     The  Holder  shall  effect   conversions   by   simultaneously
delivering to the Company and the Parent a completed notice in the form attached
hereto as Exhibit A (a "Conversion  Notice"),  including a completed  Conversion

                                      -5-


Schedule in the form of Schedule I to the Conversion  Notice (on each Conversion
Date, the "Conversion  Schedule").  The Conversion  Schedule shall set forth the
remaining principal amount of this Debenture and all accrued and unpaid interest
thereon  subsequent to the  conversion at issue.  The date on which a Conversion
Notice is delivered is the  "Conversion  Date."  Unless the Holder is converting
the entire principal amount outstanding under this Debenture,  the Holder is not
be required to  physically  surrender  this  Debenture to the Parent in order to
effect conversions. Subject to Section 4(b), each Conversion Notice, once given,
shall be  irrevocable.  Conversions  hereunder shall have the effect of lowering
the outstanding  principal  amount of this Debenture plus all accrued and unpaid
interest thereon in an amount equal to the applicable conversion, which shall be
evidenced by entries set forth in the  Conversion  Schedule.  The Holder and the
Company or the Parent  shall  maintain  records  showing  the  principal  amount
converted  and the date of such  conversions.  In the  event of any  dispute  or
discrepancy, the records of the Holder shall be controlling and determinative in
the absence of manifest error.

            (ii)  CERTAIN CONVERSION RESTRICTIONS.

                  (A)    A Holder  may not  convert  the  Debenture  or  receive
shares of Common  Stock as  payment of  interest  hereunder  to the extent  such
conversion  or receipt of such  interest  payment  would  result in the  Holder,
together  with any  affiliate  thereof,  beneficially  owning (as  determined in
accordance  with Section  13(d) of the  Exchange  Act and the rules  promulgated
thereunder)  in excess of 9.999% of the then  issued and  outstanding  shares of
Common  Stock,  including  shares  issuable upon  conversion  of, and payment of
interest  on,  the  Debenture  held by such  Holder  after  application  of this
Section.  Since the Holder will not be obligated to report to the Company or the
Parent  the  number  of  shares  of  Common  Stock  it may hold at the time of a
conversion  hereunder,  unless  the  conversion  at issue  would  result  in the
issuance of shares of Common  Stock in excess of 9.999% of the then  outstanding
shares  of  Common  Stock  without  regard  to any  other  shares  which  may be
beneficially owned by the Holder or an affiliate thereof,  the Holder shall have
the authority and obligation to determine  whether the restriction  contained in
this Section will limit any  particular  conversion  hereunder and to the extent
that  the  Holder  determines  that the  limitation  contained  in this  Section
applies,  the  determination  of which  portion of the  principal  amount of the
Debenture is  convertible  shall be the  responsibility  and  obligation  of the
Holder.  If the Holder has delivered a Conversion  Notice for a principal amount
of the Debenture that, without regard to any other shares that the Holder or its
affiliates may  beneficially  own, would result in the issuance in excess of the
permitted amount  hereunder,  the Company and the Parent shall notify the Holder
of this fact and shall honor the  conversion  for the maximum  principal  amount
permitted to be converted on such Conversion Date in accordance with the periods
described  in Section 4(b) and, at the option of the Holder,  either  retain any
principal  amount  tendered for  conversion  in excess of the  permitted  amount
hereunder for future  conversions or return such excess  principal amount to the
Holder. The provisions of this Section may be waived by a Holder (but only as to
itself and not to any other  Holder)  upon not less than 65 days prior notice to
the  Company and the  Parent.  Other  Holders  shall be  unaffected  by any such
waiver.

     (b)  (i)     On the Original  Issue Date,  the Parent shall  deliver to the
Parent's  transfer  agent  corporate  issuance  resolutions  with respect to the
issuance of Common Stock pursuant to the terms of the Debenture.

                                      -6-


          (ii)    Nothing  herein shall limit a Holder's  right to pursue actual
damages  or declare  an Event of  Default  pursuant  to Section 3 herein for the
Parent's  failure to deliver  certificates  representing  shares of Common Stock
upon conversion  within the period  specified  herein and such Holder shall have
the right to pursue all remedies  available to it at law or in equity including,
without limitation,  a decree of specific  performance and/or injunctive relief.
The  exercise of any such rights  shall not  prohibit the Holder from seeking to
enforce  damages  pursuant to any other Section hereof or under  applicable law.
Further,  if the Company or the Parent shall not have  delivered any cash due in
respect of conversion of the Debenture or as payment of interest  thereon by the
fifth (5th) Trading Day after the Conversion  Date, the Holder may, by notice to
the Company and the Parent,  require the Parent to issue  shares of Common Stock
pursuant to Section  4(c),  except that for such  purpose the  Conversion  Price
applicable thereto shall be the lesser of the Conversion Price on the Conversion
Date and the Conversion Price on the date of such Holder demand. Any such shares
will be subject to the provisions of this Section.

          (iii)   In addition to any other rights  available  to the Holder,  if
the  Company or the Parent  fails to deliver to the Holder such  certificate  or
certificates  pursuant to Section  4(b)(i) by the fifth (5th)  Trading Day after
the  Conversion  Date,  and if after such  fifth  (5th)  Trading  Day the Holder
purchases (in an open market  transaction or otherwise)  Common Stock to deliver
in  satisfaction  of a sale by such Holder of the  Underlying  Shares  which the
Holder anticipated receiving upon such conversion (a "Buy-In"), then the Company
and the Parent  shall (A) pay in cash to the Holder (in addition to any remedies
available  to or elected  by the  Holder)  the amount by which (x) the  Holder's
total purchase price (including  brokerage  commissions,  if any) for the Common
Stock so purchased exceeds (y) the product of (1) the aggregate number of shares
of Common Stock that such Holder  anticipated  receiving  from the conversion at
issue  multiplied by (2) the market price of the Common Stock at the time of the
sale  giving  rise to such  purchase  obligation  and (B) at the  option  of the
Holder,  either  reissue  a  Debenture  in the  principal  amount  equal  to the
principal amount of the attempted conversion or deliver to the Holder the number
of shares of Common  Stock that would have been  issued had the  Company and the
Parent  timely  complied  with its delivery  requirements.  For example,  if the
Holder  purchases Common Stock having a total purchase price of $11,000 to cover
a Buy-In with respect to an attempted  conversion of Debentures  with respect to
which the market price of the Underlying  Shares on the date of conversion was a
total of $10,000 under clause (A) of the  immediately  preceding  sentence,  the
Company and the Parent  shall be required to pay the Holder  $1,000.  The Holder
shall provide the Company and the Parent written  notice  indicating the amounts
payable  to the  Holder  in  respect  of the  Buy-In.  Notwithstanding  anything
contained  herein to the  contrary,  if a Holder  requires  the  Company and the
Parent to make payment in respect of a Buy-In for the failure to timely  deliver
certificates  hereunder  and the Company and the Parent  timely pay in full such
payment,  neither the Company or the Parent shall be required to pay such Holder
liquidated  damages  under  Section  4(b)(ii)  in  respect  of the  certificates
resulting in such Buy-In.

     (c)  (i)     The conversion price (the "Conversion Price") in effect on any
Conversion Date shall be the lower of (x) $0.34 or (y) 85% of the average of the
lowest  three  inter-day  trading  prices  (which need not occur on  consecutive
Trading  Days)  during the twenty (20) Trading Days  immediately  preceding  the
applicable  Conversion  Date  (which may not include  Trading  Days prior to the
Original Issue Date),  provided,  that such twenty (20) Trading Day period shall
be  extended  for the number of Trading  Days  during  such  period in which (A)

                                      -7-


trading  in the  Common  Stock is  suspended  by, or not traded on, the OTC or a
Subsequent  Market on which the Common  Stock is then  listed,  or (B) after the
date, the Underlying Shares Registration  Statement is declared effective by the
Commission,  the  Prospectus  included  in the  Underlying  Shares  Registration
Statement may not be used by the Holder for the resale of Underlying Shares.

          (ii)    If the Parent,  at any time while the Debenture is outstanding
shall (a) pay a stock dividend or otherwise make a distribution or distributions
on  shares  of its  Common  Stock  or any  other  equity  or  equity  equivalent
securities  payable in shares of Common Stock, (b) subdivide  outstanding shares
of Common Stock into a larger number of shares, (c) combine (including by way of
reverse stock split) outstanding shares of Common Stock into a smaller number of
shares,  or (d) issue by  reclassification  of shares  of the  Common  Stock any
shares of capital stock of the Company,  then the Initial Conversion Price shall
be multiplied by a fraction of which the numerator shall be the number of shares
of Common Stock  (excluding  treasury shares,  if any)  outstanding  before such
event and of which the denominator shall be the number of shares of Common Stock
outstanding after such event. Any adjustment made pursuant to this Section shall
become  effective  immediately  after the record date for the  determination  of
stockholders  entitled to receive such dividend or distribution and shall become
effective  immediately  after the effective  date in the case of a  subdivision,
combination or re-classification.

          (iii)   If the Parent, at any time while the Debenture is outstanding,
shall issue rights,  options or warrants to all holders of Common Stock (and not
to the Holder)  entitling  them to  subscribe  for or purchase  shares of Common
Stock at a price per share  less than the Per Share  Market  Value at the record
date  mentioned  below,  then the  Conversion  Price  shall be  multiplied  by a
fraction,  of which the denominator  shall be the number of shares of the Common
Stock (excluding treasury shares, if any) outstanding on the date of issuance of
such rights or warrants  (plus the number of  additional  shares of Common Stock
offered for  subscription or purchase),  and of which the numerator shall be the
number  of  shares of the  Common  Stock  (excluding  treasury  shares,  if any)
outstanding on the date of issuance of such rights or warrants,  plus the number
of shares which the  aggregate  offering  price of the total number of shares so
offered would purchase at such Per Share Market Value.  Such adjustment shall be
made  whenever  such rights or warrants are issued,  and shall become  effective
immediately after the record date for the determination of stockholders entitled
to receive such rights, options or warrants. However, upon the expiration of any
such  night,  option or  warrant  to  purchase  shares of the  Common  Stock the
issuance of which resulted in an adjustment in the Conversion  Price pursuant to
this  Section,  if any such right,  option or warrant shall expire and shall not
have been exercised, the Conversion Price shall immediately upon such expiration
be recomputed and effective immediately upon such expiration be increased to the
price  which it would have been (but  reflecting  any other  adjustments  in the
Conversion  Price made  pursuant to the  provisions  of this  Section  after the
issuance of such rights or warrants) had the adjustment of the Conversion  Price
made upon the  issuance of such  rights,  options or  warrants  been made on the
basis of offering for subscription or purchase only that number of shares of the
Common Stock  actually  purchased  upon the exercise of such rights,  options or
warrants actually exercised.

          (iv)    If the Parent or any subsidiary  thereof,  as applicable  with
respect to Common Stock  Equivalents (as defined  below),  at any time while the
Debenture  is  outstanding,  shall  issue  shares  of  Common  Stock or  rights,
warrants,  options  or other  securities  or debt that are  convertible  into or

                                      -8-


exchangeable for shares of Common Stock ("Common Stock  Equivalents")  entitling
any Person to acquire shares of Common Stock, at a price per share less than the
Conversion  Price (if the holder of the Common Stock or Common Stock  Equivalent
so issued shall at any time, whether by operation of purchase price adjustments,
reset provisions, floating conversion, exercise or exchange prices or otherwise,
or due to  warrants,  options or rights per share which is issued in  connection
with such issuance, be entitled to receive shares of Common Stock at a price per
share which is less than the Conversion  Price, such issuance shall be deemed to
have occurred for less than the Conversion  Price),  then, at the sole option of
the Holder,  the  Conversion  Price shall be adjusted to mirror the  conversion,
exchange or purchase  price for such Common  Stock or Common  Stock  Equivalents
(including any reset provisions thereof) at issue. Such adjustment shall be made
whenever such Common Stock or Common Stock  Equivalents  are issued.  The Parent
shall  notify  the Holder and the  Escrow  Agent in  writing,  no later than the
business  day  following  the  issuance  of any  Common  Stock or  Common  Stock
Equivalent subject to this section,  indicating therein the applicable  issuance
price, or of applicable reset price, exchange price,  conversion price and other
pricing  terms.  No  adjustment  under this Section shall be made as a result of
issuances and exercises of options to purchase shares of Common Stock issued for
compensatory  purposes  pursuant to any of the  Parent's  stock  option or stock
purchase plans.

          (v)     If the Parent, at any time while the Debenture is outstanding,
shall  distribute  to all  holders  of  Common  Stock  (and  not to the  Holder)
evidences of its  indebtedness  or assets or rights or warrants to subscribe for
or purchase any security,  then in each such case the Conversion  Price at which
the Debenture shall thereafter be convertible shall be determined by multiplying
the Conversion  Price in effect  immediately  prior to the record date fixed for
determination  of  stockholders  entitled  to  receive  such  distribution  by a
fraction of which the denominator shall be the Per Share Market Value determined
as of the record date mentioned  above, and of which the numerator shall be such
Per Share  Market  Value on such record date less the then fair market  value at
such record date of the  portion of such assets or evidence of  indebtedness  so
distributed  applicable  to  one  outstanding  share  of  the  Common  Stock  as
determined  by the  Board  of  Directors  in good  faith.  In  either  case  the
adjustments  shall be  described  in a  statement  provided to the Holder of the
portion  of  assets  or  evidences  of   indebtedness  so  distributed  or  such
subscription  rights  applicable to one share of Common Stock.  Such  adjustment
shall be made whenever any such  distribution is made and shall become effective
immediately after the record date mentioned above.

          (vi)    In case of any  reclassification  of the  Common  Stock or any
compulsory  share exchange  pursuant to which the Common Stock is converted into
other securities,  cash or property,  the Holder shall have the right thereafter
to, at its option, (A) convert the then outstanding  principal amount,  together
with all accrued but unpaid  interest and any other amounts then owing hereunder
in respect of this Debenture only into the shares of stock and other securities,
cash and property  receivable upon or deemed to be held by holders of the Common
Stock following such  reclassification or share exchange,  and the Holder of the
Debenture  shall  be  entitled  upon  such  event  to  receive  such  amount  of
securities,  cash or  property  as the shares of the Common  Stock of the Parent
into which the then outstanding principal amount,  together with all accrued but
unpaid  interest and any other  amounts then owing  hereunder in respect of this
Debenture could have been converted  immediately prior to such  reclassification
or share exchange  would have been  entitled,  or (B) require the Parent and the

                                      -9-


Company to prepay the outstanding  principal  amount of the Debenture,  plus all
interest and other  amounts due and payable  thereon,  at a price  determined in
accordance with Section 3(b). The entire prepayment price shall be paid in cash.
This provision shall similarly  apply to successive  reclassifications  or share
exchanges.

          (vii)   The Parent  shall  maintain  a share  reserve of not less than
200% of the shares of Common Stock  issuable upon  conversion of the  Debenture;
and within  three (3)  Business  Days  following  the receipt by the Parent of a
Holder's  notice  that  such  minimum  number  of  Underlying  Shares  is not so
reserved,  the Parent  shall if there are  sufficient  authorized  but  unissued
shares promptly reserve a sufficient  number of shares of Common Stock to comply
with such  requirement.  If there are not  sufficient  authorized  but  unissued
shares,  the Parent shall use its best  efforts to call a special  shareholders'
meeting  within  sixty  (60)  days of such  notice  to  increase  the  number of
authorized shares of Common Stock.

          (viii)  All  calculations  under  this  Section 4 shall be made to the
nearest  cent or the  nearest  1/100th  of a  share,  as the  case  may  be.  No
adjustments in either the Conversion Price or the Initial Conversion Price shall
be required if such adjustment is less than $0.01,  provided,  however, that any
adjustments which by reason of this Section are not required to be made shall be
carried forward and taken into account in any subsequent adjustment.

          (ix)    Whenever either the Initial Conversion Price or the Conversion
Price is adjusted  pursuant to any of Section  4(c)(ii) - (v),  the Parent shall
promptly mail to the Holder a notice setting forth the Initial  Conversion Price
or Conversion  Price (as  applicable)  after such adjustment and setting forth a
brief statement of the facts requiring such adjustment.

          (x)     If (A) the  Parent  shall  declare  a  dividend  (or any other
distribution)  on the  Common  Stock;  (B) the  Parent  shall  declare a special
nonrecurring  cash  dividend on or a  redemption  of the Common  Stock;  (C) the
Parent shall authorize the granting to all holders of the Common Stock rights or
warrants to subscribe  for or purchase any shares of capital  stock of any class
or of any rights;  (D) the approval of any  stockholders  of the Parent shall be
required  in  connection  with any  reclassification  of the Common  Stock,  any
consolidation  or merger to which the Parent or the Company is a party, any sale
or transfer of all or  substantially  all of the assets of the  Company,  of any
compulsory  share  exchange  whereby the Common  Stock is  converted  into other
securities,  cash or property; (E) the Parent or the Company shall authorize the
voluntary or involuntary  dissolution,  liquidation or winding up of the affairs
of the Parent or the Company;  then, in each case,  the Parent shall cause to be
filed at each office or agency  maintained  for the purpose of conversion of the
Debenture,  and shall cause to be mailed to the Holder at its last address as it
shall appear upon the stock books of the Parent,  at least twenty (20)  calendar
days prior to the applicable record or effective date hereinafter  specified,  a
notice  stating (x) the date on which a record is to be taken for the purpose of
such dividend,  distribution,  redemption, rights or warrants, or if a record is
not to be taken,  the date as of which the holders of the Common Stock of record
to be entitled to such dividend,  distributions,  redemption, rights or warrants
are  to  be  determined  or  (y)  the  date  on  which  such   reclassification,
consolidation,  merger,  sale,  transfer or share exchange is expected to become
effective or close,  and the date as of which it is expected that holders of the
Common Stock of record shall be entitled to exchange  their shares of the Common
Stock  for   securities,   cash  or  other   property   deliverable   upon  such
reclassification,  consolidation,  merger,  sale,  transfer  or share  exchange,
provided,  that the failure to mail such notice or any defect  therein or in the

                                      -10-


mailing  thereof shall not affect the validity of the corporate  action required
to be specified in such notice.  The Holder is entitled to convert the Debenture
during the twenty (20) day calendar period commencing the date of such notice to
the effective date of the event triggering such notice.

          (xi)    In case of any (1)  merger or  consolidation  of the Parent or
the  Company  with or into  another  Person,  or (2) sale by the  Parent  or the
Company of more than  one-half  (1/2) of the assets of the Parent or the Company
in one or a series of related transactions, a Holder shall have the right to (A)
exercise any rights under  Section  3(b),  (B) convert the  aggregate  principal
amount of the  Debenture  then  outstanding  into the  shares of stock and other
securities, cash and property receivable upon or deemed to be held by holders of
Common Stock following such merger, consolidation or sale, and such Holder shall
be entitled  upon such event or series of related  events to receive such amount
of  securities,  cash and property as the shares of Common Stock into which such
aggregate   principal   amount  of  the  Debenture  could  have  been  converted
immediately  prior to such  merger,  consolidation  or  sales  would  have  been
entitled, or (C) in the case of a merger or consolidation, require the surviving
entity to issue to the Holder a convertible  debenture  with a principal  amount
equal to the  aggregate  principal  amount  of the  Debenture  then held by such
Holder,  plus all accrued and unpaid  interest and other amounts owing  thereon,
which such  newly  issued  convertible  debenture  shall  have  terms  identical
(including with respect to conversion) to the terms of this Debenture, and shall
be entitled to all of the rights and  privileges  of the Holder of the Debenture
set forth  herein  and the  agreements  pursuant  to which the  Debentures  were
issued. In the case of clause (C), the conversion price applicable for the newly
issued shares of convertible preferred stock or convertible  debentures shall be
based upon the amount of securities, cash and property that each share of Common
Stock  would  receive in such  transaction  and the  Conversion  Price in effect
immediately prior to the effectiveness or closing date for such transaction. The
terms of any such merger,  sale or consolidation  shall include such terms so as
to  continue to give the Holder the right to receive  the  securities,  cash and
property set forth in this Section upon any  conversion or redemption  following
such event. This provision shall similarly apply to successive such events.

     (d)  The  Parent  covenants  that it will at all  times  reserve  and  keep
available out of its authorized  and unissued  shares of Common Stock solely for
the purpose of issuance upon conversion of the Debenture and payment of interest
on the Debenture,  each as herein provided,  free from preemptive  rights or any
other actual  contingent  purchase rights of persons other than the Holder,  not
less than such  number of shares of the Common  Stock as shall  (subject  to any
additional requirements of the Parent as to reservation of such shares set forth
in  the  Debenture)  be  issuable  (taking  into  account  the  adjustments  and
restrictions of Section 4(b)) upon the conversion of the  outstanding  principal
amount of the Debenture and payment of interest hereunder.  The Parent covenants
that all shares of Common Stock that shall be so issuable shall,  upon issue, be
duly and validly  authorized,  issued and fully paid,  nonassessable and, if the
Underlying Shares  Registration  Statement has been declared effective under the
Securities  Act,  registered for public sale in accordance  with such Underlying
Shares Registration Statement.

     (e)  Upon a conversion  hereunder the Parent shall not be required to issue
stock certificates representing fractions of shares of the Common Stock, but may
if otherwise permitted,  make a cash payment in respect of any final fraction of
a share based on the Per Share Market Value at such time.  If the Parent  elects
not, or is unable, to make such a cash payment,  the Holder shall be entitled to

                                      -11-


receive,  in lieu of the final  fraction  of a share,  one whole share of Common
Stock.

     (f)  The  issuance  of  certificates  for  shares  of the  Common  Stock on
conversion of the Debenture  shall be made without  charge to the Holder thereof
for any documentary stamp or similar taxes that may be payable in respect of the
issue or delivery of such  certificate,  provided  that the Parent  shall not be
required to pay any tax that may be payable in respect of any transfer  involved
in the issuance and delivery of any such  certificate  upon conversion in a name
other  than that of the Holder of such  Debenture  so  converted  and the Parent
shall not be required to issue or deliver such certificates  unless or until the
person or persons  requesting the issuance thereof shall have paid to the Parent
the  amount of such tax or shall have  established  to the  satisfaction  of the
Parent that such tax has been paid.

     (g)  Any and all  notices  or  other  communications  or  deliveries  to be
provided by the Holder hereunder,  including, without limitation, any Conversion
Notice, shall be in writing and delivered  personally,  by facsimile,  sent by a
nationally  recognized  overnight  courier  service  or  sent  by  certified  or
registered mail,  postage prepaid,  addressed to the Parent and the Company,  at
753 W. Big Beaver,  Suite 1700,  Troy,  Michigan 48084, or such other address or
facsimile  number as the Parent may specify  for such  purposes by notice to the
Holder  delivered in accordance with this Section.  Any and all notices or other
communications  or  deliveries  to be  provided  by the  Parent  or the  Company
hereunder shall be in writing and delivered personally,  by facsimile, sent by a
nationally  recognized  overnight  courier  service  or  sent  by  certified  or
registered  mail,  postage  prepaid,  addressed to each Holder at the  facsimile
telephone  number  or  address  of such  Holder  appearing  on the  books of the
Company,  or if no such facsimile  telephone number or address  appears,  at the
principal place of business of the Holder. Any notice or other  communication or
deliveries  hereunder shall be deemed given and effective on the earliest of (i)
the date of  transmission,  if such notice or  communication  is  delivered  via
facsimile at the facsimile  telephone  number specified in this Section prior to
5:00 p.m. (New York City time), (ii) the date after the date of transmission, if
such  notice or  communication  is  delivered  via  facsimile  at the  facsimile
telephone  number  specified in this Section later than 5:00 p.m. (New York City
time) on any date and earlier than 11:59 p.m. (New York City time) on such date,
(iii) four (4) days after deposit in the United  States mail,  (iv) the Business
Day following the date of mailing,  if sent by nationally  recognized  overnight
courier service,  or (v) upon actual receipt by the party to whom such notice is
required to be given.

     SECTION 5.   DEFINITIONS.  For the purposes  hereof,  the  following  terms
shall have the following meanings:

     "Business  Day"  means any day  except  Saturday,  Sunday and any day which
shall be a federal  legal holiday in the United States or a day on which banking
institutions  are  authorized or required by law or other  government  action to
close.

     "Change of Control  Transaction" means the occurrence of (a) an acquisition
after the date hereof by an  individual or legal entity or "group" (as described
in Rule  13d-5(b)(1)  promulgated  under the Exchange Act) of effective  control
(whether  through legal or beneficial  ownership of capital stock of the Company
or the  Parent,  by  contract  or  otherwise)  of in excess of 33% of the voting
securities of the Company or the Parent,  (b) a replacement  at one time or over
time of more than  one-half of the members of the board of  directors  of either

                                      -12-


the  Company  or the  Parent  which  is not  approved  by a  majority  of  those
individuals  who are members of the board of directors on the date hereof (or by
those  individuals  who are serving as members of the board of  directors on any
date whose  nomination  to the board of directors  was approved by a majority of
the members of the board of directors who are members on the date  hereof),  (c)
the merger, consolidation or sale of 50% or more of the assets of the Company or
the  Parent  in one or a series of  related  transactions  with or into  another
entity,  or (d) the  execution  by the Company or the Parent of an  agreement to
which the Company is a party or by which it is bound,  providing  for any of the
events set forth above in (a), (b) or (c).

     "Commission" means the Securities and Exchange Commission.

     "Common Stock" means the common stock,  $0.0000303 par value per share,  of
the Parent and stock of any other class into which such shares may  hereafter be
changed or reclassified.

     "Exchange Act" means the Securities Exchange Act of 1934, as amended.

     "Funding  Event" means any  transaction  or series of  transactions  closed
after the  Original  Issue  Date in which the  Company  or the  Parent,  or both
collectively,  raise  $4,000,000  or more gross through the sale of their equity
securities.

     "Original  Issue  Date"  shall mean the date of the first  issuance  of the
Debenture  regardless of the number of transfers and regardless of the number of
instruments, which may be issued to evidence such Debenture.

     "Per Share  Market  Value"  means the price per share in the last  reported
trade of the  Common  Stock on the OTC or on a  Subsequent  on which the  Common
Stock is then listed.

     "Person" means a corporation, an association, a partnership,  organization,
a business,  an individual,  a government or political  subdivision thereof or a
governmental agency.

     "Purchase Agreement" means that purchase agreement, dated February __, 2003
to which the  Company,  the  Parent and the  original  Holder  are  parties,  as
amended,  modified  or  supplemented  from time to time in  accordance  with its
terms.

     "Registration  Rights  Agreement" means the Registration  Rights Agreement,
dated as of the Original Issue Date, to which the Company and the Parent and the
original Holder are parties,  as amended,  modified or supplemented from time to
time in accordance with its terms.

     "Securities  Act" means the  Securities  Act of 1933,  as amended,  and the
rules and regulations promulgated thereunder.

     "Trading Day" means a day on which the shares of Common Stock are quoted on
the OTC or quoted or traded  on such  Subsequent  Market on which the  shares of
Common  Stock are then  quoted or listed;  provided,  that in the event that the
shares of Common  Stock are not listed or quoted,  then Trading Day shall mean a
Business Day.

                                      -13-


     "Transaction  Documents"  shall have the meaning set forth in the  Purchase
Agreement.

     "Underlying  Shares"  means  the  shares  of  Common  Stock  issuable  upon
conversion  of the  Debenture or as payment of interest in  accordance  with the
terms hereof.

     "Underlying Shares Registration  Statement" means a registration  statement
meeting  the  requirements  set  forth  in the  Registration  Rights  Agreement,
covering among other things the resale of the  Underlying  Shares and naming the
Holder as a "selling stockholder" thereunder.

     SECTION 6.   Except as  expressly  provided  herein,  no  provision of this
Debenture  shall alter or impair the  obligations of the Company and the Parent,
which are absolute and  unconditional,  to pay the  principal  of,  interest and
liquidated damages (if any) on, this Debenture at the time, place, and rate, and
in  the  coin  or  currency,  herein  prescribed.  This  Debenture  is a  direct
obligation of the Company and the Parent.  This Debenture  ranks pari passu with
all other  Debentures now or hereafter  issued under the terms set forth herein.
As long as the  Debenture is  outstanding,  the Company and the Parent shall not
and shall cause their  subsidiaries  not to,  without the consent of the Holder,
(i) amend its certificate of incorporation, bylaws or other charter documents so
as to adversely affect any rights of the Holder; (ii) repay, repurchase or offer
to repay,  repurchase or otherwise  acquire  shares of its Common Stock or other
equity securities other than as to the Underlying Shares to the extent permitted
or required under the Transaction  Documents;  or (iii) enter into any agreement
with respect to any of the foregoing.

     SECTION 7.   This  Debenture  shall not  entitle  the  Holder to any of the
rights  of a  stockholder  of the  Parent  or  the  Company,  including  without
limitation, the right to vote, to receive dividends and other distributions,  or
to receive any notice of, or to attend,  meetings of  stockholders  or any other
proceedings  of the Parent or the  Company,  unless and to the extent  converted
into shares of Common Stock in accordance with the terms hereof.

     SECTION 8.   If this Debenture is mutilated, lost, stolen or destroyed, the
Company and the Parent shall execute and deliver,  in exchange and  substitution
for  and  upon  cancellation  of the  mutilated  Debenture,  or in lieu of or in
substitution for a lost, stolen or destroyed debenture,  a new Debenture for the
principal amount of this Debenture so mutilated,  lost,  stolen or destroyed but
only upon  receipt  of  evidence  of such  loss,  theft or  destruction  of such
Debenture,  and of the  ownership  hereof,  and  indemnity,  if  requested,  all
reasonably satisfactory to the Company and the Parent.

     SECTION 9.   No indebtedness of the Company or the Parent is senior to this
Debenture in right of payment, whether with respect to interest, damages or upon
liquidation or dissolution or otherwise. The Company and the Parent will not and
will not permit any of their  subsidiaries  to,  directly or  indirectly,  enter
into, create,  incur, assume or suffer to exist any indebtedness of any kind, on
or with respect to any of its property or assets now owned or hereafter acquired
or any  interest  therein or any income or profits  there from that is senior in
any  respect  to the  obligations  of the  Company  and  the  Parent  under  the
Debenture.

     SECTION 10.  This   Debenture   shall  be  governed  by  and  construed  in
accordance  with the laws of the State of  California,  without giving effect to
conflicts  of laws  thereof.  The  Company,  the Parent  and the  Holder  hereby
irrevocably submit to the exclusive jurisdiction of the state and federal courts

                                      -14-


sitting  in the  City  of Los  Angeles,  for  the  adjudication  of any  dispute
hereunder or in connection herewith or with any transaction  contemplated hereby
or discussed herein,  and hereby  irrevocably  waive, and agree not to assert in
any suit, action or proceeding,  any claim that it is not personally  subject to
the  jurisdiction of any such court, or that such suit,  action or proceeding is
improper.  Each of the Company and the Parent hereby irrevocably waives personal
service of process and consents to process being served in any such suit, action
or  proceeding  by sending a copy  thereof to the  Company and the Parent at the
address in effect for notices to them under this instrument and both the Company
and the Parent  agree that such service  shall  constitute  good and  sufficient
service of process and notice thereof.  Nothing contained herein shall be deemed
to limit in any way any right to serve  process in any manner  permitted by law.
Each party  irrevocably  waives,  to the fullest extent  permitted by applicable
law, any and all right to trial by jury in any legal  proceeding  arising out of
or relating to this Agreement or the transactions contemplated hereby. If either
party shall  commence an action or  proceeding  to enforce any  provisions  of a
Transaction  Document,  then the  prevailing  party in such action or proceeding
shall be reimbursed  by the other party for its  attorneys  fees and other costs
and expenses  incurred with the  investigation,  preparation  and prosecution of
such action or proceeding.

     SECTION 11.  Any  waiver by the  Company,  the  Parent  or the  Holder of a
breach of any provision of this  Debenture  shall not operate as or be construed
to be a waiver of any other  breach of such  provision  or of any  breach of any
other provision of this Debenture. The failure of the Company, the Parent or the
Holder to insist upon strict  adherence to any term of this  Debenture on one or
more  occasions  shall not be  considered  a waiver or deprive that party of the
right  thereafter to insist upon strict adherence to that term or any other term
of this Debenture. Any waiver must be in writing.

     SECTION 12.  If any  provision  of this  Debenture  is invalid,  illegal or
unenforceable,  the balance of this Debenture shall remain in effect, and if any
provision is inapplicable to any person or circumstance,  it shall  nevertheless
remain applicable to all other persons and  circumstances.  If it shall be found
that any interest or other amount deemed  interest due  hereunder  shall violate
applicable laws governing  usury,  the applicable rate of interest due hereunder
shall  automatically be lowered to equal the maximum permitted rate of interest.
The Company and the Parent covenant (to the extent that they may lawfully do so)
that they shall not at any time insist upon,  plead, or in any manner whatsoever
claim or take the benefit or advantage  of, any stay,  extension or usury law or
other law which would  prohibit or forgive the Company or the Parent from paying
all  or any  portion  of the  principal  of or  interest  on  the  Debenture  as
contemplated herein, wherever enacted, now or at any time hereafter in force, or
which may affect the covenants or the  performance  of this  indenture,  and the
Company and the Parent (to the extent they may lawfully do so) hereby  expressly
waive all benefits or advantage of any such law, and covenants that it will not,
by resort to any such law,  hinder,  delay or impeded the execution of any power
herein granted to the Holder,  but will suffer and permit the execution of every
such as though no such law has been enacted.

     SECTION 13.  Whenever any payment or other  obligation  hereunder  shall be
due on a day other than a Business  Day,  such payment shall be made on the next
succeeding Business Day.

                                      -15-


     SECTION 14.  The  payment   obligations   under  this   Debenture  and  the
obligations  of the  Company  and the  Parent  to the  Holder  arising  upon the
conversion  of all or any of the  Debenture in  accordance  with the  provisions
hereof are secured  pursuant to the Pledge Agreement (as defined in the Purchase
Agreement).

     IN WITNESS WHEREOF, each of the Company and the Parent has caused this 6.5%
Secured  Convertible  Debenture to be duly executed by a duly authorized officer
as of the date first above indicated.

The Company                              The Parent

Presidion Solutions, Inc.                MediaBus Networks, Inc.

By: /s/ James E. Baiers                  By:  /s/ James E. Baiers
    ---------------------------              ---------------------------
Name:   James E. Baiers                  Name:    James E. Baiers
Title:  Executive Vice President/        Title:   Executive Vice President/
        General Counsel                           General Counsel

                                      -16-


                                    EXHIBIT A

                              NOTICE OF CONVERSION

(To be Executed by the Registered Holder
in order to Convert the Debenture)

The undersigned  hereby elects to convert the attached  Debenture into shares of
common stock,  $0.0000303 par value per share (the "Common Stock"),  of MediaBus
Networks,  Inc.. (the "Company")  according to the conditions  hereof, as of the
date  written  below.  If shares are to be issued in the name of a person  other
than the  undersigned,  the undersigned will pay all transfer taxes payable with
respect  thereto and is delivering  herewith such  certificates  and opinions as
reasonably  requested  by the Company in  accordance  therewith.  No fee will be
charged to the holder for any  conversion,  except for such transfer  taxes,  if
any.

Conversion calculations:
                            ----------------------------------------------------
                            Date to Effect Conversion



                            ----------------------------------------------------
                            Principal Amount of Debentures to be Converted


                            Payment of Interest in Kind             [ ]  Yes
                                                                    [ ]  No

                                If yes, $__________       of Interest Accrued on
                                                          Account of Conversion
                                                          at Issue


                            ----------------------------------------------------
                            Number of shares of Common Stock to be Issued


                            ----------------------------------------------------
                            Applicable Conversion Price



                            ----------------------------------------------------
                            Signature


                            ----------------------------------------------------
                            Name


                            ----------------------------------------------------
                            Address

                                      -17-


                                   SCHEDULE 1

                               CONVERSION SCHEDULE

                             MEDIABUS NETWORKS, INC.

6.5% Secured  Convertible  Debenture  due February  __, 2004,  in the  aggregate
principal  amount of  $______________  issued by MEDIABUS  NETWORKS,  INC.  This
Conversion Schedule reflects conversions made under Section 4(a)(i) of the above
referenced Debenture.

                                     Dated:

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                                        Aggregate
                                     Principal Amount
                                        Remaining
                                       Subsequent to
  Date of Conversion                    Conversion
 (or for first entry,     Amount of    (or original      Company
 Original Issue Date)    Conversion    Prince Amount)    Attest
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                                      -18-